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[目的]了解江苏省淮安市农村肿瘤高发区饮用水源中多环芳烃类物质的水平。[方法]选择淮安市盱眙、金湖、楚州三县(区)14个乡镇28个村,在2010年丰、枯水期分别采集地表水、浅层地下水、深层地下水共159份水样,进行多环芳烃类物质的测定,并分析其与当地人群上消化道肿瘤死亡率的相关性。[结果]多环芳烃类物质总质量浓度(以下简称“浓度”)为(2 700.09±5 756.08)ng/L,丰水期高于枯水期[(4 914.68±7 247.71)ng/L,(219.74±147.80)ng/L;t=5.95,P=0.00],从高到低依次为地表水、浅层地下水及深层地下水,差异有统计学意义(F=6.15,P=0.00);三个县(区)多环芳烃浓度差异有统计学意义(F=17.40,P=0.00)。根据我国国家标准GB 5749—2006《生活饮用水卫生标准》,多环芳烃类物质总超标率为26.42%;丰水期为50.00%,枯水期无超标情况。丰水期3种水源超标率,以地表水为最高,其次为浅层地下水,深层地下水最低(χ2=7.75,P=0.02);丰水期三个县(区)超标率不同(χ2=46.80,P=0.00)。相关分析显示,饮用水中多环芳烃物质浓度与上消化道肿瘤死亡率均无相关(P>0.05)。[结论]淮安市农村肿瘤高发区饮用水源中多环芳烃类物质浓度较高,没有发现与上消化道肿瘤死亡率相关。
[Objective] To understand the levels of polycyclic aromatic hydrocarbons (PAHs) in drinking water sources in rural areas with high incidence of cancer in Huaian City, Jiangsu Province. [Method] 28 villages in 14 towns and villages in Xuhu, Jinhu and Chuzhou counties of Huai’an City were selected. A total of 159 water samples of surface water, shallow groundwater and deep groundwater were collected during the abundance and dry season of 2010 respectively The determination of naphthalene and its correlation with the mortality rate of upper gastrointestinal cancer in the local population were analyzed. [Result] The total mass concentration of PAHs was (2 700.09 ± 5 756.08) ng / L in the wet season and higher than that in the dry season [(4914.68 ± 7 247.71) ng / L, (219.74 ± 147.80) ng / L; t = 5.95, P = 0.00]. The descending order was surface water, shallow groundwater and deep groundwater in descending order (F = 6.15, P = 0.00) The concentration of PAHs in each county (district) was significantly different (F = 17.40, P = 0.00). According to China’s national standard GB 5749-2006 “drinking water health standards”, total polycyclic aromatic hydrocarbons exceeded the standard rate of 26.42%; wet period of 50.00%, dry season no excessive. In the wet season, the exceeding rates of three kinds of water sources were the highest, the surface water was the highest, the second was the shallow groundwater, the lowest was the deep groundwater (χ2 = 7.75, P = 0.02) , P = 0.00). Correlation analysis showed that the concentrations of PAHs in drinking water were not related to the mortality of upper gastrointestinal cancer (P> 0.05). [Conclusion] The concentrations of polycyclic aromatic hydrocarbons (PAHs) in drinking water sources in rural areas with high incidence of cancer in Huaian City are higher than those in upper gastrointestinal cancer.